<!DOCTYPE html>
<html>
  <head>
    <title>websocket test</title>
  </head>
  <body>
    <button id="test_button">测试(TEST)</button>
    <button id="test_quit">退出(Quit)</button>
    <div id="test_board"></div>
    <script src="main.js"></script>
  </body>
</html>